[Twisted-web] Large file uploads

exarkun at twistedmatrix.com exarkun at twistedmatrix.com
Fri Jul 23 23:50:06 EDT 2010

On 23 Jul, 08:34 pm, julian at whisper-net.de wrote:
>Hash: SHA1
>Am 16.07.2010 17:33, schrieb exarkun at twistedmatrix.com:
>>You can override `Request.gotLength` to inspect the request and select
>>an appropriate destination for the request body.
>>You can convince Site to use your custom request by setting it as the
>>`requestFactory` attribute.
>thanks for your reply. In meantime I tried cherrypy, which does its job
>very good but has some flaws compared to my twisted applications when 
>comes to performance and resource usage. So I'm still interested in
>solving my problem by using twisted.
>The problem is as follows: The file which shall be uploaded is sent via
>a HTML form (encoded as multipart/form-data), and I'd like to use
>Python's FieldStorage to parse the request body because it handles the
>file matters very well. You can tell cherrypy, that for a certain
>request uri cherrypy should not parse the request body but instead pass
>it on unparsed to the handler method.
>Is there a simple way of configuring twisted.web in this way to?
>So that e.g. if request uri /do-upload-form is issued, twisted.web does
>not try to parse the request body on its own and generate the args dict
>to pass on to the render_POST method, but instead uses FieldStorage (or
>better: my own subclass of FieldStorage, which employs a NamedTempFile
>instead of an anonymous tempfile, which allows me to simply rename it
>after it has passed some sanity checks) for parsing the body?

This will be easier once #288 is resolved.  Until then, you just have to 
hack around with the Request to change the behavior at a very low level.


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